Reinforced concrete construction.



A. H. SGHUETT. RBINFORCED CONCRETE CONSTRUCTION.

Patented Mar. 9, 1915.

8 SHEETS-SHEET 1.

APPLICATION FILED SBPT.15,1910 ,092.

A. H. SGHUBTT.

RBINFCRCBD CONCRETE CONSTRUCTION.

APPLICATION FILED SBPT.15, 1910.

1,1 31,092. Patented Mar. 9, 1915.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ALBERT I-I. SCHUETT, OF ST. PAUL, MINNESOTA, ASSIGNOR TO PATENTEDDEVICES COMPANY, 0I? PORTLAND, MAINE, A CORPORATION OF MAINE.

REINFORCED CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented Mar. 9, 1915,.

Application filed September 15, 1910. Serial No. 582,269.

T0 all whom it may concern Be it known that I, ALBERT H. ScHUn'r'r, acitizen of the United States, residin at St. Paul, in the county ofRamsey and tate of Minnesota, have invented certain Improvements inReinforced Concrete Construction, of which the following is aspeciication.

This invention relates to improvements in the construction of reinforcedconcrete buildings, and particularly to the means for arranging thereinforced concrete floors, and the columns supporting the same; alsothe arrangement of the steel to reinforce the slabs and the support ofthe slabs.

The invention consists generally in the constructions and combinationshereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figurel is a plan view of a portion of a reinforced concrete Hoor, embodyingmy invention. Fig. 2 is a section on the line 2-2 of Fig. l. Fig. 3 is asectional elevation of the columns and brackets formed integrallytherewith. Fig. 4 is a vertical section on line 4-4 of Fig. 6. Fig. 5 isa vertical section on line .5-5 of Fig. 6. Fig. (i is a plan view of aconstruction in principle the same as Fig. 1, but using tile in place ofthat portion of the concrete that is not required to resist shear, toaid in compression or required for the development of the steel.

Heretofore it has been customary in the construction of {ire-proofbuildings of reinforced concrete to provide a series of' reinforcedcolumns arranged in rows in right angles to each other. and to supportupon the tops of these columns reinforced concrete girders, extendingfrom the tops of the columns, in one or two directions, and at rightangles to each other,- thus providing a series of horizontal.,rectangular panels, and then to provide aareinforced concrete floorresting upon and sup-ported by sai/d girders. There are numerousobjections to this type of construction, among which may be mentionedthe fact that the girders are expensive to construct, occupyconsiderable space and reduce the amount of light coming into thebuilding; interfere with the location of partitions and are anobjectionable protrusion into the room space of the building. Thegirders as ordinarily used are very expensive as they require a largeamount of steel in their construction. I overcome the objections to thistype of construction by the combinations shown in theaccompanyingdrawings and described in the specification.

In carrying out mv invention I provide a 'series of reinforced concretecolumns 2.

These columns may be reinforced in any preferred manner. I have shown inthe drawings,` and prefer to use, a construction embodying a series ofvertical rods 3, arranged in a circle near the outer circumference ofthe column, with a spirally wound rod or wire l, inclosing said verticalrods. These columns are preferably spaced regularly in rows in twodirections, at right angles to each other throughout the space withinthe inclosing walls of the building. I have shown the rods arranged atequal distances from one another in both directions so that lines atright angles to each other, joining the centers of the columns, willform equal sided parallelograms, or squares. If preferred, however, thedistance between the centers of the columns in one direction may begreater than the distance between the centers of the columns in theother direction, in which case lines at right angles to each other,joining the centers of the columns, will form parallelograms, two ofwhose sides are of greater length than the other two sides. Formedintegrally with each column are brackets, preferably four in number,extending from the tops of the columns, and preferably in directionsdiagonally to the outer walls of the building. These brackets formcantalivers at the tops of the columns. The reinforcing rods for theopposite brackets extend through the top of the adjacent column as shownin Fig. 3 of the drawings. AAs here shown I preferably provide a seriesof rods 5. which extend horizontally through the column and for thelength of each bracket. near the top thereof. At the ends of thebrackets, these rods are provided with a depending section 5 and thenwith the inclined sections 5, which extend near the bottom wall of the l1ackct to and into the side of the column. I thus have a single bar 5.with the two depending sections 5 and the two inclined sections 5". Infact, the bar is bent substantially to conform to the outline of twooppositely arranged brackets. In addition Iprefer to provide for eachbracket additional rods 6, each of which extends through the top of thecolumn and is then provided with an inclined section 6, extendingdiagonally through the bracket to a point near the lower wall thereof,then at an incline parallel with the bottom of the bracket in a sectionmarked 6 and withan upturned end 6. These bars are of different lengthsso as to be distributed throughout the length of the brackets. I havehere shown three of theI bars (5, but a greater or less number may beemployed as required, and any desired number of small bars may bearranged side by side in the body of the bracket. I also prefer toprovide a series of vertical wire stirrups 7, extending around all o'l"the rods 5 and t5, as shown by the section of one of' the brackets in Fig. 3. This arrangement o1 the rods and wires in the brackets makes cachbecome a cantaliver and the rods 5 and (5 constitute the necessaryvreinforcement to resist the bending or tension strain upon the bracket.The inclined. portions U ofthe rod also provide suitable resistanceagainst the vcrtical shearing stress, while the wire stirrups 7 hold therods in proper relation to each other, and with the inclined portion 6of the rod 6 provide the proper resistance against the horizontalshearing stress. l

I do not employ any beams or girders in the construction of the lioor,but I provide a fiat slab floor that is supported upon and formedintegrally with the brackets already described. In constructing thislloor I provide two series of reinforcing rods 8 and t) that arepreferably arranged in groups and extend at right angles to each other,throughout the length and width ol the building, and which'preferablycross the brackets diagonally and at points near their outer ends. Thisarrangement is clearly illustrated in Fig. l of the drawings, in whichthe outlines of the brackets are shown by dotted lines and the groups ofrods S are shown extending cross-wise of the sheet and passingdiagonally through, or over, the ends of the brackets at points neartheir ends, and the rods 9 are Shown extending at right angles to therods S, and in similar relation to the ends ot' the brackets.

The rods 8 and 9 in my construction, take the place of girders in theusual construction, and divide the Hoor up into a series of panels. Ilprefer to provide the` reinforcement for the floor by several parallelsets of rods which extend across, or through, one of the panels and havetheir ends embedded in the arms of the brackets. This arrange-- mentwill be readily understood from an examination of Fig. l of thedrawings. Here it will be seen that the rods l0 run through the lowerpanel of Fig. l, and have their ends embedded in the opposite bracketarms. The rods 11 in the upper panel are parallel to the rods l0 andhave their ends embedded in the opposite brackets. The rods l2 in theright. hand panel and 13 in the left hand panel, are parallel to eachother, but at right angles to the rods 10 and ll. The rods l2 and 13 areshown in section in Fig. 2 of the drawings. In this figure the rods 9are also shown. It will be seen that this arrangement provides forsupporting all of the panels of the iloor directly upon the brackets,but it leaves an intermediate panel not supported. 'Ihis panel isprovided with two series of rods in order that the portion of the slabacting as a girder or beam will-not be overloaded. I prefer for thispanel to provide (see Figs. l and 2) two series of rods 14 and l5, nearthe under side of the floor, arranged at right angles to each other andpassing over the rods S and 9, and in the upper part of the lloor Iprefer to provide an additional set of short rods 16, arranged over therods 8 and 9 clear around the panel and projecting over these rods intothe adjacent panel as shown in Fig. l of the'drawings. These rods formcantalivers in the upper part of the floor and materially aid in thereinforcement of the intermediate panel. Il preferred the brackets onthe tops of the columns may extend in directions parallel with thcoutside walls of the building, and, in this instance, the girder rodsmay cross the bracket arms at right angles. This construction will besomewhat heavier than that which I have described and I consider thediagonal arrangement preferable. I may, with the saine arrangement ofbrackets and rods, use a tile coi'istruction for the lloor outside oithe panels directly over the brackets as shown in Figs. i, 5 and (5. Thearrangement of the brackets and of the girder rods S and tl is the samein this instance as that represented by Figs. l and il of the drawings,but instead of having' the panels outside of thc ones that are directlyover the brackets formed of the reinforced concrete, I may employ hollowtile for forming the panel sections as shown in Figs. 4, and of thedrawings. In this instance, in the panels between the rows of columns, Iarrange a series of reinforcing rods 17, parallel to the girdcr rods 8,and at right angles to the girder rods 9. (See Fig. 5.) The ends ofthese rods are preferably upturned at 17 and are embedded in theconcrete of the adjacent panels. Between the rods 17 I arrange a seriesof hollow tiles 18. These tiles are preferably placed in rows, the tilesin each row being close to each other and the spaces between the rows,in which the rods 17 are inclosed, being 'filled with concrete whichunites with the .edges of the tiles and holds the files in position. Inthe adjacent series '02 panels (excepting those panels that are' rectlyover the heads of the columns and the brackets) I arrange similar rods19, preferably extending at right angles to the girder rods 8 andparallel with the girder rods 9, and I prefer to arrange tile 18between`these rods in the manner already described. By this arrangement,having the rodsin one set of panels at right angles to those of theotheryfthe load of the flat slab floor is equally distributed to the twosets of girder rods 8 and 9, and thus equally distributed to all of thebrackets on the reinforced columns. The tile 18 shown in section in Fig.4 of the drawings, may differ in thickness, thereby requiring the use ofmore concrete at the points nearest to the girder rods 8 and 9 where theshear is greatest. If it is desired to use so-called four-piece tile,the tile in each row may be separated and cross-reinforcing rods atright anglesyto the rodsr17, may be employed in each panel.

Short reinforcing rods 20, corresponding to the rods 16 in Figs. 1 and2, may, if preferred, be employed in the top of the slab over and atright angles to the girder rods 8 and 9. (See Figs. l and 5.) These rodswill act as cantalivers for the panel sections between the said girderrods 8 and 9.

I do not limit myself to the use of reinforced Concrete columns andbrackets. I

-congjder thesepreferable, but the advanes of my flat slab floor may beobtained oy using steel or other suitable columns, with steel or othersuitable brackets arranged thereon. In this instance the brackets willnotextend above the line of the unbrackets.

It will be obvious that the details of the construction may be varied inmany particulars without departing from my invention.

I claim as my invention,

1. In a reinforced concrete building structure, the combination with aseries of reinforced columns, of reinforced brackets formed integrallywith said columns, and projecting therefrom in opposite directions,reinforcing girder rods 8 and 9, extending from column to column atright angles to each other and diagonally through the said brackets,near the ends thereof, and dividing the Hoor s aceinto a series ofpanels, and a series ol reinforcing flo-or slab rods arranged in eachpanel, parallel to each abther, the rods in one row of panels being atAthe first mentioned an vil right angles to the rods in the adjacent rowof panels, substantially as described.

2. In a reinforced concrete building structure, the combination with aseries of reinforced columns, of reinforced brackets formed integrallywith said columns and projecting therefrom in opposite directions,

reinforcing girder rods'8 and 9 arranged at right angles to each otherand extending from column to column and through said brackets, near theouter ends thereof, and dividing the floor space\ into a series ofpanels, a series offloor slab rods 17 extending through each panel, atright angles to the girder rods 9, and a series of floor slab rods 19extending through the panels of the next adjacent rows, at right 'anglestothe Y having intersecting ends and arranged in.

the form of a polygon, aid central portion being surrounded andsupported by said as f beams, and reinforcement within the slab formingcantalivers over the main supports and vsupporting the beams at theangles of the polygon. y

. 4. A girderless monolithic reinforced-concrete construction consistingof a plurality of main supports and a lflat slab ofconcrete over themain supports, said supports being located at the angles of the slab,said slab containing reinforcement extending directly from one supportto another and forming beams of a width 'exceeding the thickness of theslab,said slab comprising a'central portion, reinforcement within theslab forming a plurality of beams lying between the first mentionedbeams and Vthe central port'ion, the second mentioned beams beingarranged in the form of a polygon, yand reinforcing means within theslab forming cantalivers over the main supports and supporting thesecond mentioned beams at the angles of the polygon.

5. A girderless monolithic reinforced-concrete construction consistingof a plurality of main supports and a fiat slab of concrete over themain supports, said supports being located at the angles of the slab,said slab containing reinforcement extending directly from one mainsupport to another and forming beams of a width exceeding the thicknessof the slab, said slab comprising a centralf ortion reinforcementYwithin the slab forming a pluralityof beams lying between the central 13por'tion, and carrying said central portion, i In 1witness whereof,I-have beteunt' set the secofnd mentioned1 beams being arfranged my handthis 12 day of Sept. 1791.0.-v p in the orm of a po ygon and rein orcngi means rWithin the slab folming cantalivers `g ALBE\RT HbCHUETT ove1`the main supports and supporting the Witnesses.; second mentioned beamsat the angles of the TAQCE GOLDEN,

polygon. G. E SORNsEN.\

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